<template>
  <el-menu :collapse="isCollapse"
           default-active="2"
           class="el-menu-vertical-demo"
           background-color="#99CC99"
           text-color="#000000">
    <h3 v-show="!isCollapse">Esun后台管理系统</h3>
    <h3 v-show="isCollapse">Esun</h3>
    <el-menu-item :index="item.path"
                  v-for="item in noChildren"
                  :key="item.path"
                  @click="clickMenu(item)">
      <i :class="'el-icon-' + item.icon"></i>
      <span slot="title">{{ item.label }}</span>
    </el-menu-item>

    <el-submenu index="index"
                v-for="(item, index) in hasChildren"
                :key="index">
      <template slot="title">
        <i :class="'el-icon-' + item.icon"></i>
        <span slot="title">{{ item.label }}</span>
      </template>
      <el-menu-item-group>
        <el-menu-item :index="subItem.path"
                      v-for="(subItem, subIndex) in item.children"
                      :key="subIndex"
                      @click="clickMenu(subItem)">
          <i :class="'el-icon-' + subItem.icon"></i>
          <span slot="title">{{ subItem.label }}</span>
        </el-menu-item>
      </el-menu-item-group>
    </el-submenu>
  </el-menu>
</template>

<script>
export default {
  computed: {
    noChildren () {
      return this.menu.filter((item) => !item.children)
    },
    hasChildren () {
      return this.menu.filter((item) => item.children)
    },
    isCollapse () {
      return this.$store.state.tab.isCollapse
    },
    menu () {
      return this.$store.state.tab.menu
    }
  },
  data () {
    return {
      asideMenu: [
        {
          path: '/',
          name: 'home',
          label: '首页',
          icon: 's-home',
        },
        {
          path: '/video',
          name: 'video',
          label: '视频管理',
          icon: 'video-play',
        },
        {
          path: '/user',
          name: 'user',
          label: '用户管理',
          icon: 'user',
        },
        {
          path: '/user',
          label: '其他',
          icon: 's-data',
          children: [
            {
              path: '/page1',
              name: 'page1',
              label: '页面1',
              icon: 'setting',
            },
            {
              path: '/page2',
              name: 'page2',
              label: '页面2',
              icon: 'setting',
            },
          ],
        },
      ],
    }
  },
  methods: {
    clickMenu (item) {
      this.$router.push({ name: item.name })
      this.$store.commit('selectMenu', item)
    },
  },
}
</script>

<style lang="scss" scoped>
.el-menu {
  height: 100%;
  border: none;
  h3 {
    color: #000000;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
      Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    text-align: center;
    line-height: 48px;
  }
}
.el-menu-vertical-demo:not(.el-menu--collapse) {
  width: 200px;
  min-height: 400px;
}
</style>
